TMS370C012A 概述
8-BIT MICROCONTROLLER 8位微控制器
TMS370C012A 数据手册
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PDF下载TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
JD AND N PACKAGES
(TOP VIEW)
CMOS/EEPROM/EPROM Technologies on
a Single Device
– Mask-ROM Devices for High-Volume
Production
– One-Time-Programmable (OTP) EPROM
Devices for Low-Volume Production
– Reprogrammable-EPROM Devices for
Prototyping Purposes
Internal System Memory Configurations
– On-Chip Program Memory Versions
– ROM: 2K, 4K, or 8K Bytes
D6
D7
A7
1
2
3
4
5
6
7
8
9
28 D3
27 RESET
26 D4
V
25 SPISOMI
24 SPICLK
23 SPISIMO
22 T1IC/CR
21 T1PWM
20 T1EVT
19 MC
CC
XTAL2/CLKIN
XTAL1
A6
A5
A4
A3 10
A2 11
18 INT3
– EPROM: 8K Bytes
V
12
17 INT2
SS
A1 13
16 INT1
– Data EEPROM: 256 Bytes
– Static RAM: 128 or 256 Bytes Usable as
Registers
A0 14
15 D5
FZ AND FN PACKAGES
(TOP VIEW)
Flexible Operating Features
– Low-Power Modes: STANDBY and HALT
– Commercial, Industrial, and Automotive
Temperature Ranges
4
3
2
1
28 27 26
25
– Clock Options
5
XTAL2/CLKIN
SPISOMI
SPICLK
SPISIMO
T1IC/CR
T1PWM
T1EVT
– Divide-by-1 (2 MHz–5 MHz SYSCLK)
Phase-Locked Loop (PLL)
– Divide-by-4 (0.5 MHz–5 MHz SYSCLK)
6
XTAL1
A6
24
23
22
21
20
19
7
8
A5
9
– Supply Voltage (V ) 5 V ±10%
A4
CC
10
11
A3
16-Bit General Purpose Timer
– Software Configurable as
a 16-Bit Event Counter, or
A2
MC
12 13 14 15 16 1718
a 16-Bit Pulse Accumulator, or
a 16-Bit Input Capture Functions, or
Two Compare Registers, or a
Self-Contained PWM Function
– Software Programmable Input Polarity
– 8-Bit Prescaler, Providing a 24-Bit
Real-Time Timer
– Synchronous Master/Slave Operation
TMS370 Series Compatibility
– Register-to-Register Architecture
– 128 or 256 General-Purpose Registers
– 14 Powerful Addressing Modes
– Instructions Upwardly Compatible With
All TMS370 Devices
CMOS/TTL Compatible I/O Pins/Packages
– All Peripheral Function Pins Software
Configurable for Digital I/O
– 21 Bidirectional Pins, 1 Input Pin
– 28-Pin Plastic and Ceramic DIP, or
Leaded Chip Carrier (LCC) Packages
Workstation/PC-Based Development
System
– C Compiler and C Source Debugger
– Real-Time In-Circuit Emulation
– Extensive Breakpoint/Trace Capability
– Multi-Window User Interface
On-Chip 24-Bit Watchdog Timer
– EPROM/OTP Devices:
– EPROM ’712A Standard Watchdog
– EPROM ’712B Hard Watchdog
– Mask-ROM Devices: Hard Watchdog,
Simple Counter, or Standard Watchdog
Flexible Interrupt Handling
– Two Software Programmable Interrupt
Levels
– Global-and Individual-Interrupt Masking
– Programmable Rising- or Falling-Edge
Detect
– Individual Interrupt Vectors
Serial Peripheral Interface (SPI)
– Variable-Length High-Speed Shift
Register
– Microcontroller Programmer
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright 1997, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
Pin Descriptions
28 PINS
DIP and LCC
†
DESCRIPTION
I/O
NAME NO.
A0
A1
A2
A3
A4
A5
A6
A7
14
13
11
10
9
8
7
3
I / O
Port A is a general-purpose bidirectional I/O port.
D3
D4
D5
D6
D7
28
26
15
1
I / O
Port D is a general-purpose bidirectional I/O port. D3 is also configurable as SYSCLK.
2
INT1
INT2
INT3
16
17
18
I
External interrupt (non-maskable or maskable)/general-purpose input pin
External maskable interrupt input/general-purpose bidirectional pin
External maskable interrupt input/general-purpose bidirectional pin
I / O
I / O
T1IC/CR
T1PWM
T1EVT
22
21
20
Timer1 input capture/counter reset input pin /general-purpose bidirectional pin
Timer1 PWM output pin/general-purpose bidirectional pin
Timer1 external event input pin/general-purpose bidirectional pin
I / O
I / O
SPISOMI
SPISIMO
SPICLK
25
23
24
SPI slave output pin, master input pin/general-purpose bidirectional pin
SPI slave input pin, master output pin/general-purpose bidirectional pin
SPI bidirectional serial clock pin/general-purpose bidirectional pin
System reset bidirectional pin; as input pin, RESET initializes the microcontroller; as open-drain output,
RESET indicates that an internal failure was detected by watchdog or oscillator fault circuit.
RESET
MC
27
19
I / O
I
Mode control input pin; enables EEPROM write protection override (WPO) mode, also EPROM V
PP
XTAL2/CLKIN
XTAL1
5
6
I
O
Internal oscillator crystal input/External clock source input
Internal oscillator output for crystal
V
V
4
Positive supply voltage
Ground reference
CC
12
SS
†
I = input, O = output
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POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
functional block diagram
XTAL2/
CLKIN
INT1
INT2
INT3
XTAL1
MC
RESET
Clock Options:
Divide-By-4 or
Divide-By-1 (PLL)
System
Control
Interrupts
SPISOMI
SPISIMO
SPICLK
Serial
Peripheral
Interface
RAM
128 or 256 Bytes
CPU
Program Memory
ROM: 2K, 4K, or 8K Bytes
EPROM: 8K Bytes
Data EEPROM
0 or 256 Bytes
T1IC/CR
T1EVT
Timer 1
T1PWM
Watchdog
V
CC
Port A
8
Port D
V
SS
5
description
The TMS370C010, TMS370C012, TMS370C311, TMS370C310, TMS370C312, TMS370C712, and
SE370C712 devices are members of the TMS370 family of single-chip 8-bit microcontrollers. Unless otherwise
noted, the term TMS370Cx1x refers to these devices. The TMS370 family provides cost-effective real-time
system control through integration of advanced peripheral-function modules and various on-chip memory
configurations.
The TMS370Cx1x family of devices is implemented using high-performance silicon-gate CMOS EPROM and
EEPROM technologies. Low-operating power, wide-operating temperature range, and noise immunity of
CMOS technology coupled with the high performance and extensive on-chip peripheral functions make the
TMS370Cx1x devices attractive for system designs for automotive electronics, industrial motors, computer
peripheral controls, telecommunications, and consumer applications.
All TMS370Cx1x devices contain the following on-chip peripheral modules:
Serial peripheral interface (SPI)
One 24-bit general-purpose watchdog timer
One 16-bit general-purpose timer with an 8-bit prescaler
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POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
description (continued)
Table 1 provides a memory configuration overview of the TMS370Cx1x devices.
Table 1. Memory Configurations
PROGRAM MEMORY
(BYTES)
DATA MEMORY
(BYTES)
DEVICE
28 PIN PACKAGES
ROM
EPROM
RAM
EEPROM
FN – PLCC
N – PDIP
TMS370C010A
TMS370C012A
TMS370C311A
TMS370C310A
TMS370C312A
4K
—
128
256
128
128
128
256
256
256
FN – PLCC
N – PDIP
8K
2K
4K
8K
—
—
—
—
—
8K
8K
256
–
FN – PLCC
N – PDIP
FN – PLCC
N – PDIP
–
FN – PLCC
N – PDIP
–
TMS370C712A,
TMS370C712B
FN – PLCC
N –PDIP
256
256
†
SE370C712A ,
FZ – CLCC
JD – CDIP
—
†
SE370C712B
†
System evaluators and development are for use only in prototype environment and their reliability has not been characterized.
The suffix letter (A or B) appended to the device names shown in the device column of Tables 1 and 2 indicates
the configuration of the device. ROM or EPROM devices have different configurations as indicated in Table 2.
ROM devices with the suffix letter A are configured through a programmable contact during manufacture.
Table 2. Suffix Letter Configuration
‡
DEVICE
WATCHDOG TIMER
Standard
Hard
CLOCK
LOW-POWER MODE
Enabled
EPROM A
EPROM B
Divide-by-4 (Standard oscillator)
Divide-by-1 (PLL)
Enabled
Standard
Hard
ROM A
Divide-by-4 or Divide-by-1 (PLL)
Enabled or disabled
Simple
‡
Refer to the “device numbering conventions” section for device nomenclature and to the “device part numbers” section for ordering.
The 2K bytes, 4K bytes, and 8K bytes of mask-programmable ROM in the associated TMS370Cx1x devices
are replaced in the TMS370C712 with 8K bytes of EPROM. All other available memory and on-chip peripherals
are identical, with the exception of no data EEPROM on the TMS370C311, TMS370C310, and TMS370C312
devices. The OTP (TMS370C712) device and reprogrammable (SE370C712) device are available.
TMS370C712 OTP devices are available in plastic packages. This microcontroller is effective to use for
immediate production updates for other members of the TMS370Cx1x family or for low volume production runs
when the mask charge or cycle time for the low-cost mask ROM devices is not practical.
The SE370C712 has a windowed ceramic package to allow reprogramming of the program EPROM memory
during the development/prototyping phase of design. The SE370C712 devices allow quick updates to
breadboards and prototype systems while iterating initial designs.
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POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
description (continued)
The TMS370Cx1x family provides two low-power modes (STANDBY and HALT) for applications where
low-power consumption is critical. Both modes stop all CPU activity (that is, no instructions are executed). In
the STANDBY mode, the internal oscillator and the general-purpose timer remain active. In the HALT mode,
all device activity is stopped. The device retains all RAM data and peripheral configuration bits throughout both
low-power modes.
The TMS370Cx1x features advanced register-to-register architecture that allows direct arithmetic and logical
operations without requiring an accumulator (for example, ADD R24, R47; add the contents of register 24 to
the contents of register 47 and store the result in register 47). The TMS370Cx1x family is fully
instruction-set-compatible, providing easy transition between members of the TMS370 8-bit microcontroller
family.
The SPI provides a convenient method of serial interaction for high-speed communications between simpler
shift register-type devices, such as display drivers, analog-to-digital (A/D) converters, PLL, input/output (I/O)
expansion, or other microcontrollers in the system.
The TMS370Cx1x family provides the system designer with economical, efficient solution to real-time control
applications. The TMS370 family extended development system (XDS ) and compact development tool
(CDT ) solve the challenge of efficiently developing the software and hardware required to design the
TMS370Cx1x into an ever-increasing number of complex applications. The application source code can be
written in assembly and C language, and the output code can be generated by the linker. The TMS370 family
XDS development tool communicates through a standard RS-232-C interface with an existing personal
computer. This allows the use of the PC’s editors and software utilities already familiar to the designer. The
TMS370familyXDSemphasizesease-of-usethroughextensivemenusandscreenwindowingsothatasystem
designer can begin developing software with minimal training. Precise real-time, in-circuit emulation and
extensive symbolic debug and analysis tools ensure efficient software and hardware implementation as well
as reducing the time-to-market cycle.
The TMS370Cx1x family together with the TMS370 family XDS22, CDT370, design kit, starter kit, software
tools, the SE370C712 reprogrammable devices, comprehensive product documentation, and customer
support provide a complete solution to the needs of the system designer.
central processing unit (CPU)
The CPU on the TMS370Cx1x device is the high-performance 8-bit TMS370 CPU module. The ’x1x implements
an efficient register-to-register architecture that eliminates the conventional accumulator bottleneck. The
complete ’x1x instruction map is shown in Table 17 in the TMS370Cx1x instruction set overview section.
The ’370Cx1x CPU architecture provides the following components:
CPU registers:
A stack pointer that points to the last entry in the memory stack
A status register that monitors the operation of the instructions and contains the global interrupt-enable bits
A program counter (PC) that points to the memory location of the next instruction to be executed
XDS and CDT are trademarks of Texas Instruments Incorporated.
5
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
central processing unit (CPU) (continued)
Figure 1 illustrates the CPU registers and memory blocks.
Program Counter
15
0
Legend:
Stack Pointer (SP)
7
0
C=Carry
N=Negative
Status Register (ST)
Z=Zero
C
7
N
6
Z
5
V
4
IE2 IE1
V=Overflow
IE2=Level 2 interrupts Enable
IE1=Level 1 interrupts Enable
3
2
1
0
RAM (Includes up to 256-Byte Registers File)
0000h
0000h
R0(A)
R1(B)
128-Byte RAM (0000h–007Fh)
256-Byte RAM (0000h–00FFh)
007Fh
0080h
0001h
0002h
0003h
00FFh
0100h
100Fh
1010h
104Fh
1050h
1EFFh
1F00h
1FFFh
2000h
†
Reserved
R2
R3
Peripheral File
†
Reserved
256-Byte Data EEPROM
‡
Not Available
5FFFh
6000h
R127
8K-Byte ROM/EPROM (6000h–7FFFh)
4K-Byte ROM (7000h–7FFFh)
007Fh
6FFFh
7000h
77FFh
7800h
2K-Byte ROM (7800h–7FFFh)
7FBFh
7FC0h
Interrupts and Reset Vectors;
Trap Vectors
R255
7FFFh
00FFh
†
‡
Reserved means the address space is reserved for future expansion.
Not available means the address space is not accessible.
Figure 1. Programmer’s Model
A memory map includes:
128- or 256-byte general-purpose RAM that can be used for data memory storage, program instructions,
general purpose register, or the stack
A peripheral file that provides access to all internal peripheral modules, system-wide control functions, and
EEPROM/EPROM programming control
256-byte EEPROM module, that provides in-circuit programmability and data retention in power-off
conditions
2K-, 4K-, or 8K-byte ROM or 8K-byte EPROM
stack pointer (SP)
The SP is an 8-bit CPU register. Stack operates as a last-in, first-out, read/write memory. Typically, the stack
isusedtostorethereturnaddressonsubroutinecallsaswellasthestatusregister(ST)contentsduringinterrupt
sequences.
The SP points to the last entry or top of the stack. The SP is incremented automatically before data is pushed
onto the stack and decremented after data is popped from the stack. The stack can be placed anywhere in the
on-chip RAM.
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POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
central processing unit (CPU) (continued)
status register (ST)
The ST monitors the operation of the instructions and contains the global interrupt-enable bits. The ST includes
four status bits (condition flags) and two interrupt-enable bits.
The four status bits indicate the outcome of the previous instruction; conditional instructions (for example,
the conditional-jump instructions) use the status bits to determine program flow.
The two interrupt-enable bits control the two interrupt levels.
The ST, status-bit notation, and status-bit definitions are shown in Table 3.
Table 3. Status Registers
7
C
6
N
5
Z
4
V
3
2
1
0
IE2
IE1
Reserved
Reserved
RW-0
RW-0
RW-0
RW-0
RW-0
RW-0
R = read, W = write, 0 = value after reset
program counter (PC)
The contents of the PC point to the memory location of the next instruction to be executed. The PC consists
of two 8-bit registers in the CPU: the program counter high (PCH) and program counter low (PCL). These
registers contains the most significant byte (MSbyte) and least significant byte (LSbyte) of a 16-bit address.
During reset, the contents of the reset vector (7FFEh, 7FFFh) are loaded into the PC. The PCH (MSbyte of the
PC) is loaded with the contents of memory location 7FFEh, and the PCL (LSbyte of the PC) is loaded with the
contents of memory location 7FFFh. Figure 2 shows this operation using an example value of 6000h as the
contents of the reset vector.
Program Counter (PC)
Memory
PCH
60
PCL
00
0000h
60
00
7FFEh
7FFFh
Figure 2. Program Counter After Reset
memory map
The TMS370Cx1x architecture is based on the Von Neuman architecture, where the program memory and data
memory share a common address space. All peripheral input/output is memory mapped in this same common
addressspace. AsshowninFigure3, theTMS370Cx1xprovidesmemory-mappedRAM, ROM, dataEEPROM,
I/O pins, peripheral functions, and system-interrupt vectors.
The peripheral file contains all I/O port control, peripheral status and control, EEPROM, EPROM, and
system-wide control functions. The peripheral file is located between 1010h to 104Fh and is divided logically
intofourperipheralfileframesof16byteseach. Eachon-chipperipheralisassignedtoaseparateframethrough
which peripheral control and data information is passed.
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POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
TMS370Cx1x CPU (continued)
Peripheral File Control Registers
System Control
1010h – 101Fh
1020h – 102Fh
1030h – 103Fh
0000h
Digital Port Control
SPI Control
128-Byte RAM
(Register File/Stack)
007Fh
0080h
256-Byte RAM
Timer 1 Peripheral Control
1040h – 104Fh
(Register File/Stack)
00FFh
0100h
100Fh
1010h
†
Reserved
Peripheral File
104Fh
1050h
†
Reserved
1EFFh
1F00h
256-Byte Data EEPROM
1FFFh
2000h
Vectors
‡
Not Available
Trap 15–0
7FC0h – 7FDFh
7FE0h – 7FF3h
7FF4h – 7FF5h
5FFFh
Reserved
6000h
6FFFh
7000h
8K Bytes Start at 6000h
4K Bytes Start at 7000h
Timer 1
Serial Peripheral Interface
Interrupt 3
77FFh
7800h
7FBFh
7FC0h
7FF6h – 7FF7h
7FF8h – 7FF9h
7FFAh – 7FFBh
7FFCh – 7FFDh
7FFEh – 7FFFh
2K Bytes Start at 7800h
Interrupts and Reset Vectors;
Trap Vectors
Interrupt 2
7FFFh
8000h
Interrupt 1
Reset
‡
Not Available
FFFFh
†
‡
Reserved means that the address space is reserved for future expansion.
Not available means that the address space is not accessible.
Figure 3. TMS370Cx1x Memory Map
RAM/register file (RF)
Locations within the RAM address space can serve as the RF, general-purpose read/write memory, program
memory, or the stack instructions. The TMS370Cx10, TMS370Cx11, and TMS370C312 contain 128 bytes of
internal RAM mapped beginning at location 0000h (R0) and continuing through location 007Fh (R127) which
is shown in Table 4 along with ’712 devices.
Table 4. RAM Memory Map
’x10, ’x11 AND ’312
128 bytes
’712
RAM size
256 bytes
Memory mapped
0000h–007Fh
0000h–00FFh
The first two registers, R0 and R1, are also called register A and B, respectively. Some instructions implicitly
use register A or B; for example, the instruction LDSP (load SP) assumes that the value to be loaded into the
stack pointer is contained in register B. Registers A and B are the only registers cleared on reset.
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POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
peripheral file (PF)
The TMS370Cx1x control registers contain all the registers necessary to operate the system and peripheral
modules on the device. The instruction set includes some instructions that access the PF directly. These
instructions designate the register by the number of the PF relative to 1000h, preceded by P0 for a hexadecimal
designator or P for a decimal designator. For example, the system-control register 0 (SCCR0) is located at
address 1010h; its peripheral file hexadecimal designator is P010, and its decimal designator is P16. Table 5
shows the TMS370Cx1x PF address map.
Table 5. TMS370Cx1x Peripheral File Address Map
PERIPHERAL FILE
ADDRESS RANGE
DESCRIPTION
DESIGNATOR
P000–P00F
P010–P01F
P020–P02F
P030–P03F
P040–P04F
P050–P0FF
1000h–100Fh
1010h–101Fh
1020h–102Fh
1030h–103Fh
1040h–104Fh
1050h–10FFh
Reserved
System and EPROM/EEPROM control registers
Digital I/O port control registers
SPI registers
Timer 1 registers
Reserved
data EEPROM
TheTMS370Cx1xdevices, containing256bytesofdataEEPROM, havememorymappedbeginningatlocation
1F00h and continuing through location 1FFFh. Writing to the data EEPROM module is controlled by the data
EEPROM control register (DEECTL) and the write-protection register (WPR). Programming algorithm
examples are available in the TMS370 Family User’s Guide (literature number SPNU127) or the
TMS370FamilyDataManual(literaturenumberSPNS014B). ThedataEEPROMfeaturesincludethefollowing:
Programming:
–
–
–
Bit-, byte-, and block-write/erase modes
Internal charge pump circuitry. No external EEPROM programming voltage supply is needed.
Control register: Data EEPROM programming is controlled by the DEECTL located in the PF frame
beginning at location P01A. See Table 6.
–
In-circuit programming capability. There is no need to remove the device to program.
Write protection. Writes to the data EEPROM are disabled during the following conditions.
–
–
–
Reset. All programming of the data EEPROM module is halted.
Write protection active. There is one write-protect bit per 32-byte EEPROM block.
Low-power mode operation
Write protection can be overridden by applying 12 V to MC.
Table 6. Data EEPROM and PROGRAM EPROM Control Registers Memory Map
ADDRESS
P01A
SYMBOL
DEECTL
—
NAME
Data EEPROM Control Register
Reserved
P01B
P01C
EPCTL
Program EPROM Control Register
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POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
†
program EPROM
The TMS370C712 device contains 8K bytes of EPROM mapped, beginning at location 6000h and continuing
through location 7FFFh as shown in Figure 3. Reading the program EPROM modules is identical to reading
other internal memory. During programming, the EPROM is controlled by the EPROM control register (EPCTL).
The program EPROM module features include:
Programming
–
–
In-circuit programming capability if V is applied to MC
PP
Control register: EPROM programming is controlled by the EPROM control register (EPCTL) located in
the peripheral file (PF) frame at location P01Ch as shown in Table 6.
Write protection: Writes to the program EPROM are disabled under the following conditions:
–
–
–
Reset: All programming to the EPROM module is halted
Low-power modes
13 V not applied to MC
†
program ROM
The program ROM consists of 2K to 8K bytes of mask programmable read-only memory (see Table 7). The
program ROM is used for permanent storage of data or instructions. Programming of the mask ROM is
performed at the time of device fabrication.
Table 7. Program ROM Memory Map
’x11
’x10
’x12
ROM size
2K bytes
4K bytes
8K bytes
Memory mapped
7800h–7FFFh
7000h–7FFFh
6000h–7FFFh
system reset
The system-reset operation ensures an orderly start-up sequence for the TMS370Cx1x CPU-based device.
There are up to three different actions that can cause a system reset to the device. Two of these actions are
generated internally, while one (RESET pin) is controlled externally. These actions are as follows:
Watchdog (WD) timer. A watchdog-generated reset occurs if an improper value is written to the WD key
register, or if the re-initialization does not occur before the watchdog timer timeout . See the TMS370 Family
User’s Guide (literature number SPNU127) for more information.
Oscillator reset. Reset occurs when the oscillator operates outside of the recommended operating range.
See the TMS370 Family User’s Guide (literature number SPNU127) for more information.
External RESET pin. A low level signal can trigger an external reset. To ensure a reset, the external signal
should be held low for one SYSCLK cycle. Signals of less than one SYSCLK can generate a reset. See the
TMS370 Family User’s Guide (literature number SPNU127) for more information.
Once a reset source is activated, the external RESET pin is driven (active) low for a minimum of eight SYSCLK
cycles. This allows the ’x1x device to reset external system components. Additionally, if a cold start (V
is off
CC
for several hundred milliseconds) condition or oscillator failure occurs or the RESET pin is held low, then the
reset logic holds the device in a reset state for as long as these actions are active.
†
Memory addresses 7FF8h through 7FFFh are reserved for interrupt and reset vectors. Trap vectors, used with TRAP0 through TRAP15
instructions are located between addresses 7FC0h and 7FDFh.
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POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
system reset (continued)
After a reset, the program can check the oscillator-fault flag (OSC FLT FLAG, SCCR0.4), the cold-start flag
(COLD START, SCCR0.7) and the watchdog reset (WD OVRFL INT FLAG, T1CTL2.5) to determine the source
of the reset. A reset does not clear these flags. Table 8 depicts the reset sources.
Table 8. Reset Sources
REGISTER
SCCR0
ADDRESS
1010h
PF
BIT NO.
CONTROL BIT
COLD START
SOURCE OF RESET
Cold (power-up)
P010
P010
P04A
7
4
5
SCCR0
T1CTL2
1010h
OSC FLT FLAG
Oscillator out of range
Watchdog timer timeout
104Ah
WD OVRFL INT FLAG
Once a reset is activated, the following sequence of events occurs:
1. The CPU registers are initialized: ST = 00h, SP = 01h (reset state).
2. Register A and B are initialized to 00h (no other RAM is changed).
3. The contents of the LSbyte of the reset vector (07FFh) are read and stored in the PCL.
4. The contents of the MSbyte of the reset vector (07FEh) are read and stored in the PCH.
5. Program execution begins with an opcode fetch from the address pointed to the PC.
The reset sequence takes 20 SYSCLK cycles from the time the reset pulse is released until the first opcode
fetch. During a reset, RAM contents (except for registers A and B) remain unchanged, and the module control
register bits are initialized to their reset state.
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POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
interrupts
The TMS370 family software-programmable interrupt structure permits flexible on-chip and external interrupt
configurations to meet real-time interrupt-driven application requirements. The hardware interrupt structure
incorporates two priority levels as shown in Figure 4. Interrupt level 1 has a higher priority than interrupt
level 2. The two priority levels can be masked independently by the global interrupt mask bits (IE1 and IE2) of
the ST.
EXT INT 3
INT 3
EXT INT 2
TIMER1
INT 2
Overflow
INT3 PRI
Compare1
Ext Edge
INT2 PRI
Compare2
Input Capture
Watchdog
EXT INT1
CPU
INT1
NMI
Priority
Logic
INT1 PRI
T1 PRI
STATUS REG
IE1
Level 1 INT
Level 2 INT
IE2
Enable
SPI INT
SPI PRI
SPI
Figure 4. Interrupt Control
Each system interrupt is configured independently to either the high- or low-priority chain by the application
program during system initialization. Within each interrupt chain, the interrupt priority is fixed by the position of
the system interrupt. However, since each system interrupt is selectively configured on either the high- or
low-priority-interrupt chain, the application program can elevate any system interrupt to the highest priority.
Arbitration between the two priority levels is performed within the CPU. Arbitration within each of the priority
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POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
interrupts (continued)
chains is performed within the peripheral modules to support interrupt expansion for future modules.
Pending-interrupts are serviced upon completion of current instruction execution, depending on their interrupt
mask and priority conditions.
The TMS370Cx1x has five hardware system interrupts (plus RESET) as shown in Table 9. Each system
interrupt has a dedicated vector located in program memory through which control is passed to the interrupt
service routines. A system interrupt may have multiple interrupt sources. All of the interrupt sources are
individuallymaskablebylocalinterruptenablecontrolbitsintheassociatedperipheralfile. Eachinterruptsource
FLAG bit is individually readable for software polling or to determine which interrupt source generated the
associated system interrupt.
Two of the system interrupts are generated by on-chip peripheral functions, and three external interrupts are
supported. Software configuration of the external interrupts is performed through the INT1, INT2, and INT3
control registers in peripheral file frame 1. Each external interrupt is individually software configurable for input
polarity (rising or falling edge) for ease of system interface. External interrupt INT1 is software configurable as
either a maskable or non-maskable interrupt. When INT1 is configured as non-maskable, it cannot be masked
by the individual or global enable mask bits. The INT1 NMI bit is protected during non-privileged operation and,
therefore, should be configured during the initialization sequence following reset. To maximize pin flexibility,
external interrupts INT2 and INT3 can be software configured as general purpose input/output pins if the
interrupt function is not required (INT1 can be similarly configured as an input pin).
Table 9. Hardware System Interrupts
SYSTEM
INTERRUPT
VECTOR
ADDRESS
†
INTERRUPT SOURCE
External RESET
Watchdog Overflow
Oscillator Fault Detect
INTERRUPT FLAG
COLD START
WD OVRFL INT FLAG
OSC FLT FLAG
PRIORITY
‡
RESET
7FFEh, 7FFFh
1
‡
‡
‡
External INT1
External INT2
External INT3
INT1 FLAG
INT2 FLAG
INT3 FLAG
INT1
INT2
INT3
7FFCh, 7FFDh
7FFAh, 7FFBh
7FF8h, 7FF9h
2
3
4
SPI Receiver (Rx)/Transmitter (Tx) Data
Complete
SPI INT FLAG
SPIINT
7FF6h, 7FF7h
5
Timer 1 Overflow
T1 OVRFL INT FLAG
T1C1 INT FLAG
T1C2 INT FLAG
T1EDGE INT FLAG
T1IC1 INT FLAG
WD OVRFL INT FLAG
Timer 1 Compare 1
Timer 1 Compare 2
Timer 1 External Edge
Timer 1 Input Capture 1
Watchdog Overflow
§
T1INT
7FF4h, 7FF5h
6
†
Relative priority within an interrupt level
‡
§
Release microcontroller from STANDBY and HALT low-power modes
Release microcontroller from STANDBY low-power mode
privileged operation and EEPROM write protection override
The TMS370Cx1x family is designed with significant flexibility to enable the designer to software-configure the
system and peripherals to meet the requirements of a variety of applications. The nonprivileged mode of
operation ensures the integrity of the system configuration, once it is defined for an application. Following a
hardware reset, the TMS370Cx1x operates in the privileged mode, where all peripheral file registers have
unrestricted read/write access, and the application program configures the system during the initialization
sequence following reset. As the last step of system initialization, the PRIVILEGE DISABLE bit (SCCR2.0) is
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POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
privileged operation and EEPROM write protection override (continued)
set to 1 to enter the nonprivileged mode, disabling write operations to specific configuration-control bits within
thePF. Table 10displaysthesystem-configurationbitswhicharewrite-protectedduringthenonprivilegedmode
and must be configured by software prior to exiting the privileged mode.
Table 10. Privilege Bits
†
REGISTER
CONTROL BIT
OSC POWER
NAME
SCCRO
LOCATION
P010.6
P011.2
P011.4
MEMORY DISABLE
AUTOWAIT DISABLE
SCCR1
P012.0
P012.1
P012.3
P012.4
P012.6
P012.7
PRIVILEGE DISABLE
INT1 NMI
CPU STEST
BUS STEST
PWRDWN/IDLE
HALT/STANDBY
SCCR2
P03F.5
P03F.6
P03F.7
SPI ESPEN
SPI PRIORITY
SPI STEST
SPIPRI
T1PRI
P04F.6
P04F.7
T1 PRIORITY
T1 STEST
†
The privilege bits are shown in a bold typeface in the peripheral file
frame 1 section.
The write protect override (WPO) mode provides an external hardware method of overriding the write protection
registers (WPRs) of data EEPROM on the TMS370Cx1x. WPO mode is entered by applying a 12-V input to the
MC pin after the RESET pin input goes high (logic 1). The high voltage on the MC pin during the WPO mode
is not the programming voltage for the data EEPROM or Program EPROM. All EEPROM programming voltages
are generated on-chip. The WPO mode provides hardware system level capability to modify the content of data
EEPROM while the device remains in the application but only while requiring a 12 V external input on the MC
pin (normally not available in the end application except in a service or diagnostic environment).
low-power and IDLE modes
The TMS370Cx1x devices have two low-power modes (STANDBY and HALT) and an IDLE mode. For
mask-ROM devices, low-power modes can be disabled permanently through a programmable contact at the
time when the mask is manufactured.
The STANDBY and HALT low-power modes significantly reduce power consumption by reducing or stopping
the activity of the various on-chip peripherals when processing is not required. Each of the low-power modes
is entered by executing the IDLE instruction when the PWRDWN/IDLE bit in SCCR2 has been set to 1. The
HALT/STANDBY bit in SCCR2 controls the low-power mode selection.
In the STANDBY mode (HALT/STANDBY = 0), all CPU activity and most peripheral module activity is stopped;
however, the oscillator, internal clocks, and Timer 1 remain active. System processing is suspended until a
qualified interrupt (hardware RESET, external interrupt on INT1, INT2, INT3, or timer 1 interrupt) is detected.
In the HALT mode (HALT/STANDBY = 1), the TMS370Cx1x is placed in its lowest power consumption mode.
The oscillator and internal clocks are stopped, causing all internal activity to be halted. System activity is
suspended until a qualified interrupt (hardware RESET, external interrupt on the INT1, INT2, or INT3) is
detected. The power-down mode-selection bits are summarized in Table 11.
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POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
low-power and IDLE modes (continued)
Table 11. Low-Power/Idle Control Bits
POWER-DOWN CONTROL BITS
MODE SELECTED
PWRDWN/IDLE
(SCCR2.6)
HALT/STANDBY
(SCCR2.7)
1
0
1
STANDBY
HALT
1
0
†
X
IDLE
†
Don’t care
When low-power modes are disabled through a programmable contact in the mask-ROM devices, writing to the
SCCR2.6-7 bits is ignored. In addition, if an IDLE instruction is executed when low-power modes are disabled
through a programmable contact, the device always enters the IDLE mode.
To provide a method for always exiting low-power modes for mask-ROM devices, INT1 is enabled automatically
as a nonmaskable interrupt (NMI) during low-power modes when the hard watchdog mode is selected. This
means that the NMI is generated always, regardless of the interrupt enable flags.
The following information is preserved throughout both the STANDBY and HALT modes: RAM (register file),
CPU registers (SP, PC, and ST), I/O pin direction and output data, and status registers of all on-chip peripheral
functions. Since all CPU instruction processing is stopped during the STANDBY and HALT modes, the clocking
of the WD timer is inhibited.
clock modules
The ’x1x family provides two clock options that are referred to as divide-by-1 (phase-locked loop) and
divide-by-4 (standard oscillator). Both the divide-by-1 and divide-by-4 options are configurable during the
manufacturing process of a TMS370 MCU. The ’x1x masked ROM devices offer both options to meet system
engineering requirements. Only one of the two clock options is allowed on each ROM device. The ’712A
EPROM has only the divide-by-4, while the ’712B has divide-by-1.
The divide-by-1 clock module option provides the capability for reduced electromagnetic interference (EMI) with
no added cost.
The divide-by-1 provides a one-to-one match of the external resonator frequency (CLKIN) to the internal system
clock (SYSCLK) frequency, whereas the divide-by-4 produces a SYSCLK which is one-fourth the frequency of
the external resonator. Inside of the divide-by-1 module, the frequency of the external resonator is multiplied
by four, and the clock module then divides the resulting signal by four to provide the four-phased internal system
clock signals. The resulting SYSCLK is equal to the resonator frequency. These are formulated as follows:
external resonator frequency
4
CLKIN
4
Divide-by-4 option : SYSCLK
Divide-by-1 option : SYSCLK
external resonator frequency
4
4
CLKIN
The main advantage of choosing a divide-by-1 oscillator is the improved EMI performance. The harmonics of
low-speed resonators extend through fewer of the emissions spectrum than the harmonics of faster resonators.
The divide-by-1 provides the capability of reducing the resonator speed by four times, and this results in a
steeper decay of emissions produced by the oscillator.
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POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
system configuration registers
Table 12 contains system-configuration and control functions and registers for controlling EEPROM
programming. The privileged bits are shown in a bold typeface and shaded areas.
Table 12. Peripheral File Frame 1: System-Configuration Registers
PF
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
REG
COLD
START
OSC
POWER
PF AUTO
WAIT
OSC FLT
FLAG
MC PIN
WPO
MC PIN
DATA
µP/µC
MODE
P010
—
SCCR0
AUTO
WAIT
DISABLE
MEMORY
DISABLE
P011
—
—
—
—
—
—
—
SCCR1
SCCR2
HALT/
STANDBY
PWRDWN/
IDLE
BUS
STEST
CPU
STEST
INT1
NMI
PRIVILEGE
DISABLE
P012
—
P013
to
Reserved
P016
INT1
FLAG
INT1
PIN DATA
INT1
POLARITY
INT1
PRIORITY
INT1
ENABLE
P017
P018
P019
—
—
—
—
INT1
INT2
INT2
FLAG
INT2
PIN DATA
INT2
DATA DIR
INT2
DATA OUT
INT2
POLARITY
INT2
PRIORITY
INT2
ENABLE
INT3
FLAG
INT3
PIN DATA
INT3
DATA DIR
INT3
DATA OUT
INT3
POLARITY
INT3
PRIORITY
INT3
ENABLE
—
—
INT3
P01A
P01B
P01C
BUSY
BUSY
—
—
—
—
AP
—
W1W0
W0
EXE
EXE
DEECTL
Reserved
V
PPS
—
—
EPCTL
P01D
P01E
P01F
Reserved
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POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
digital port control registers
Peripheralfileframe2containsthedigitalI/Opinconfigurationandcontrolregisters. Table 13 shows thespecific
addresses, registers, and control bits within this peripheral file frame. Table 14 shows the port configuration
register setup.
Table 13. Peripheral File Frame 2: Digital Port-Control Registers
PF
P020
P021
P022
P023
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
Reserved
BIT 2
BIT 1
BIT 0
REG
APORT1
APORT2
ADATA
ADIR
Port A Control Register 2 (must be 0)
Port A Data
Port A Direction
P024
to
Reserved
P02B
P02C
P02D
P02E
P02F
Port D Control Register 1 (must be 0)
—
—
—
—
—
—
—
—
—
—
—
—
DPORT1
DPORT2
DDATA
DDIR
†
Port D Control Register 2 (must be 0)
Port D Data
Port D Direction
†
D3 as SYSCLK, set port D control register 2 = 08h.
Table 14. Port Configuration Register Setup
abcd
00q1
abcd
00y0
PORT
PIN
A
D
0 – 7
3 – 7
Data Out q
Data Out q
Data In y
Data In y
a = Port x Control Register 1
b = Port x Control Register 2
c = Data
d = Direction
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POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
programmable timer 1
The programmable Timer 1 (T1) module of the TMS370Cx1x provides the designer with the enhanced timer
resources required to perform real-time system control. The T1 module contains the general-purpose timer and
the watchdog (WD) timer. The two independent 16-bit timers, T1 and WD, allow program selection of input clock
sources (real-time, external event, or pulse accumulate) with multiple 16-bit registers (input capture and
compare) for special timer function control. The Timer 1 module includes three external device pins that can
be used for multiple counter functions (operation-mode dependent), or used as general-purpose I/O pins. The
T1 module block diagram is shown in Figure 5.
Edge
Select
16-Bit
Capt/Comp
T1IC/CR
Register
16-Bit
Counter
PWM
Toggle
MUX
T1PWM
16
16-Bit
Compare
Register
Interrupt
Logic
8-Bit
Prescaler
T1EVT
Interrupt
Logic
16-Bit
MUX
WatchdogCounter
(Aux. Timer)
Figure 5. Timer 1 Block Diagram
Three T1 I/O pins
–
T1IC/CR: T1 input capture / counter-reset input pin, or general-purpose bidirectional I/O pin
T1PWM: T1 pulse-width-modulation (PWM) output pin, or general-purpose bidirectional I/O pin
T1EVT: T1 event input pin, or general-purpose bidirectional I/O pin
–
–
Two operational modes:
–
–
Dual-compare mode: Provides PWM signal
Capture/compare mode: Provides input capture pin
One 16-bit general-purpose resettable counter
One 16-bit compare register with associated compare logic
One 16-bit capture/compare register, which, depending on the mode of operation, operates as either
capture or compare registers.
One 16-bit WD counter can be used as an event counter, a pulse accumulator, or an interval timer if WD
feature is not needed.
Prescaler/clock sources that determine one of eight clock sources for general-purpose timer
18
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
programmable timer 1 (continued)
Selectable edge-detection circuitry that, depending on the mode of operation, senses active transitions on
the input capture pins (T1IC/CR)
Interrupts that can be generated on the occurrence of:
–
–
–
–
A capture
A compare equal
A counter overflow
An external edge detection
Sixteen T1 module control registers located in the PF frame beginning at address P040
The T1 module control registers are illustrated in Table 15.
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POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
programmable timer 1 (continued)
Table 15. Timer 1 Module Register Memory Map
PF
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
REG
Modes: Dual-Compare and Capture/Compare
P040 Bit 15
P041 Bit 7
P042 Bit 15
P043 Bit 7
P044 Bit 15
P045 Bit 7
P046 Bit 15
P047 Bit 7
P048 Bit 7
T1Counter MSbyte
T1 Counter LSbyte
Bit 8 T1CNTR
Bit 0
Compare Register MSbyte
Compare Register LSbyte
Bit 8 T1C
Bit 0
Capture/Compare Register MSbyte
Capture/Compare Register LSbyte
Watchdog Counter MSbyte
Watchdog Counter LSbyte
Watchdog Reset Key
Bit 8 T1CC
Bit 0
Bit 8 WDCNTR
Bit 0
Bit 0 WDRST
WD OVRFL WD INPUT WD INPUT WD INPUT
T1 INPUT
SELECT2
T1 INPUT
SELECT1
T1 INPUT
SELECT0
P049
P04A
—
T1CTL1
T1CTL2
†
†
†
†
TAP SEL
SELECT2
SELECT1
SELECT0
WD OVRFL WD OVRFL WD OVRFL T1 OVRFL
T1 OVRFL
INT FLAG
T1
—
—
†
RST ENA
INT ENA
INT FLAG
INT ENA
—
SW RESET
Mode: Dual-Compare
T1EDGE
INT FLAG
T1C2
INT FLAG
T1C1
INT FLAG
T1EDGE
INT ENA
T1C2
INT ENA
T1C1
INT ENA
P04B
P04C
—
T1CTL3
T1CTL4
T1
T1C1
T1C2
T1C1
T1CR
OUT ENA
T1EDGE
POLARITY
T1CR
RST ENA
T1EDGE
DET ENA
MODE=0
OUT ENA
OUT ENA
RST ENA
Mode: Capture/Compare
T1EDGE
—
T1C1
INT FLAG
T1EDGE
INT ENA
T1C1
INT ENA
P04B
P04C
—
—
—
—
—
T1CTL3
T1CTL4
INT FLAG
T1
T1C1
T1C1
RST ENA
T1EDGE
POLARITY
T1EDGE
DET ENA
—
MODE = 1
OUT ENA
Modes: Dual-Compare and Capture/Compare
T1EVT
DATA IN
T1EVT
T1EVT
T1EVT
DATA DIR
P04D
P04E
—
—
—
—
T1PC1
T1PC2
T1PRI
DATA OUT FUNCTION
T1IC/CR T1IC/CR
DATA OUT FUNCTION
T1PWM
DATA IN
T1PWM
DATA OUT FUNCTION
T1PWM
T1PWM
DATA DIR
T1IC/CR
DATA IN
T1IC/CR
DATA DIR
T1
P04F T1 STEST
—
—
—
—
—
—
PRIORITY
†
Once the WD OVRFL RST ENA bit is set, these bits cannot be changed until a reset; this applies only to the standard
watchdog and to simple counter. In the hard watchdog, these bits can be modified at any time; the WD INPUT SELECT2
bits are ignored.
20
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
programmable timer 1 (continued)
Figure 6 shows the Timer 1 capture/compare mode block diagram. The annotations on the diagram identify the
register and the bit(s) in the PF. For example, the actual address of T1CTL2.0 is 104Ah, bit 0, in the T1CTL2
register.
T1CC.15-0
16-Bit
LSB
T1C1
OUT ENA
Capt/Comp
Register
Prescale
Clock
Source
MSB
T1PC2.7-4
T1PWM
T1CTL4.6
T1CNTR.15–0
LSB
MSB
16-Bit
Counter
16
T1 PRIORITY
0
1
T1C1 INT FLAG
T1CTL3.5
T1PRI.6
Level 1 Int
Level 2 Int
Compare=
Reset
T1CTL3.0
T1C.15-0
T1 SW
RESET
T1C1 INT ENA
16-Bit
LSB
T1C1
RST ENA
Compare
Register
T1CTL2.0
MSB
T1 OVRFL INT FLAG
T1CTL2.3
T1CTL4.4
T1CTL2.4
T1 OVRFL INT ENA
T1PC2.3-0
T1IC/CR
T1EDGE DET ENA
T1EDGE INT FLAG
T1CTL3.7
Edge
Select
T1CTL4.0
T1CTL3.2
T1EDGE INT ENA
T1CTL4.2
T1EDGE POLARITY
Figure 6. Capture/Compare Mode
21
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
programmable timer 1 (continued)
Figure 7 shows the Timer 1 dual-compare mode block diagram. The annotations on the diagram identify the
register and the bit(s) in the peripheral frame. For example, the actual address of T1CTL2.0 is 104Ah, bit 0, in
the T1CTL2 register.
T1CC.15-0
16-Bit
Capt/Comp
Register
T1C2 INT FLAG
T1CTL3.6
LSB
Prescaler
Clock
Source
MSB
Output
Enable
T1CTL3.1
T1C2 INT ENA
T1CTL4.5
Compare=
T1CNTR.15-0
T1PC2.7-4
T1PWM
T1C2 OUT ENA
T1CTL4.6
LSB
MSB
16-Bit
Counter
16
T1C1 INT FLAG
T1CTL3.5
T1CTL3.0
Reset
Compare=
T1C1 OUT ENA
T1CTL4.3
T1C1
RST ENA
T1C.15-0
T1 SW
RESET
T1C1 INT ENA
16-Bit
Compare
Register
LSB
T1CTL4.4
T1CR OUT ENA
T1CTL2.0
MSB
T1 OVRFL INT FLAG
T1CTL2.3
T1CTL2.4
T1 OVRFL INT ENA
T1CTL4.1
T1CR
RST ENA
T1PC2.3-0
T1IC/CR
Edge
Select
T1 PRIORITY
T1PRI.6
0
1
T1CTL4.0
T1EDGE INT FLAG
T1CTL3.7
Level 1 Int
Level 2 Int
T1EDGE DET ENA
T1CTL4.2
T1CTL3.2
T1EDGE INT ENA
T1EDGE POLARITY
Figure 7. Dual-Compare Mode
22
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
programmable timer 1 (continued)
The TMS370Cx1x device includes a 24-bit WD timer, contained in the T1 module, which can be programmed
as an event counter, pulse accumulator, or interval timer if the WD function is not used. The WD function is to
monitor software and hardware operation and to implement a system reset when the WD counter is not properly
serviced (WD counter overflow or WD counter is re-initialized by an incorrect value). The WD can be configured
as one of three mask options as follows: standard watchdog, hard WD, or simple counter.
Standard watchdog configuration (see Figure 8) for ’C712A EPROM and mask-ROM devices:
–
Watchdog mode
–
–
Ten different WD overflow rates ranging from 6.55 ms to 3.35 s at 5-MHz SYSCLK
AWDresetkey(WDRST)registerisusedtoclearthewatchdogcounter(WDCNTR)whenacorrect
value is written.
–
–
Generates a system reset if an incorrect value is written to the WD reset key or if the counter
overflows
A WD overflow flag (WD OVRFL INT FLAG) bit that indicates whether the WD timer initiated a
system reset
–
Non-watchdog mode
–
Watchdog timer can be configured as an event counter, pulse accumulator or an interval timer
WDCNTR.15-0
WD OVRFL
INT FLAG
T1CTL2.6
16-Bit
Watchdog Counter
T1CTL2.5
Interrupt
WD OVRFL
INT ENA
Reset
Clock
Prescaler
T1CTL1.7
T1CTL2.7
WD OVRFL
TAP SEL
System Reset
WD OVRFL
RST ENA
Watchdog Reset Key
WDRST.7-0
Figure 8. Standard Watchdog
23
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
programmable timer 1 (continued)
Hard watchdog configuration (see Figure 9) for ’C712B EPROM and mask-ROM devices:
–
–
Eight different WD overflow rates ranging from 26.2 ms to 3.35 s at 5-MHz SYSCLK
A WD reset key (WDRST) register is used to clear the watchdog counter (WDCNTR) when a correct
value is written.
–
–
Generates a system reset if an incorrect value is written to the WDRST or if the counter overflows
A WD overflow flag (WD OVRFL INT FLAG) bit that indicates whether the WD timer initiated a system
reset
–
–
Automatic activation of the WD timer upon power-up reset
INT1 is enabled as a nonmaskable interrupt during low power modes.
WDCNTR.15-0
WD OVRFL
INT FLAG
16-Bit
Watchdog Counter
T1CTL2.5
Reset
Clock
Prescaler
T1CTL1.7
System Reset
WD OVRFL
TAP SEL
Watchdog Reset Key
WDRST.7-0
Figure 9. Hard Watchdog
24
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
programmable timer 1 (continued)
Simple counter configuration (see Figure 10) for mask-ROM devices only
–
Simple counter can be configured as an event counter, pulse accumulator, or an internal timer.
WDCNTR.15-0
WD OVFL
16-Bit
Watchdog Counter
T1CTL2.6
INT FLAG
Interrupt
T1CTL2.5
WD OVRFL
INT ENA
Reset
Clock
Prescaler
T1CTL1.7
WD OVRFL
TAP SEL
Watchdog Reset Key
WDRST.7-0
Figure 10. Simple Counter
serial peripheral interface
The SPI is a high-speed synchronous serial I/O port that allows a serial bit stream of programmed length (one
to eight bits) to be shifted into and out of the device at a programmable bit transfer rate. The SPI normally is
used for communications between the microcontroller and external peripherals or another microcontroller.
Typical applications include external I/O or peripheral expansion by way of devices such as shift registers,
display drivers, and A/D converters. Multi-device communications are supported by the master/slave operation
of the SPI. The SPI module features include the following:
Three external pins
–
–
–
SPISOMI: SPI slave output/master input pin or general-purpose bidirectional I/O pin
SPISIMO: SPI slave input/master output pin or general-purpose bidirectional I/O pin
SPICLK: SPI serial clock pin or general-purpose bidirectional I/O pin
Two operational modes: Master and slave
Baud rate: Eight different programmable rates
–
Maximum baud rate in master mode: 2.5M bps at 5-MHz SYSCLK
SYSCLK
2
SPI BAUD RATE
2b
where b=bit rate in SPICCR.5-3 (range 0–7)
–
Maximum baud rate in slave mode: 625K bps at 5-MHz SYSCLK
for maximum slave SPI BAUD RATE < SYSCLK/8
Data word format: one to eight data bits
Simultaneous receiver and transmitter operations (transmit function can be disabled in software)
25
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
serial peripheral interface (continued)
Transmitter and receiver operations are accomplished through either interrupt-driven or polled algorithms.
Seven SPI module control registers located in control register frame beginning at address P030h
The SPI module-control registers are illustrated in Table 16.
Table 16. SPI Module-Control Register Memory Map
PF
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
REG
SPI SW
RESET
CLOCK
POLARITY
SPI BIT
RATE2
SPI BIT
RATE1
SPI BIT
RATE0
SPI
CHAR2
SPI
CHAR1
SPI
CHAR0
P030
SPICCR
RECEIVER
OVERRUN
SPI INT
FLAG
MASTER/
SLAVE
SPI INT
ENA
P031
—
—
—
TALK
SPICTL
P032
to
Reserved
P036
P037
P038
P039
RCVD7
SDAT7
RCVD6
SDAT6
RCVD5
SDAT5
RCVD4
SDAT4
RCVD3
RCVD2
SDAT2
RCVD1
SDAT1
RCVD0
SDAT0
SPIBUF
SPIDAT
Reserved
SDAT3
P03A
to
Reserved
P03C
SPICLK
DATA IN
SPICLK
SPICLK
SPICLK
DATA DIR
P03D
P03E
P03F
—
—
—
—
SPIPC1
SPIPC2
SPIPRI
DATA OUT FUNCTION
SPISOMI SPISOMI
DATA OUT FUNCTION
SPISIMO
DATA IN
SPISIMO
DATA OUT FUNCTION
SPISIMO
SPISIMO
DATA DIR
SPISOMI
DATA IN
SPISOMI
DATA DIR
SPI
STEST
SPI
PRIORITY
SPI
ESPEN
—
—
—
—
—
26
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
serial peripheral interface (continued)
The SPI block diagram is illustrated in Figure 11.
RECEIVER
SPIBUF.7-0
OVERRUN
SPIBUF Buffer
SPICTL.7
Register
SPIPRI.6
8
SPICTL.0
SPI INT FLAG
SPICTL.6
0
Level 1 INT
1
Level 2 INT
SPIINT ENA
SPIPC2.7-4
SPISIMO
SPIDAT
Data Register
SPIDAT.7-0
SPICTL.1
TALK
SPIPC2.3-0
SPISOMI
State Control
SPICCR.2-0
†
MASTER/SLAVE
SPI CHAR
SPICTL.2
2
1
0
SPIPC1.3-0
SPICLK
System
Clock
SPICCR.6
CLOCK POLARITY
SPICCR.5-3
5
4
3
SPI BIT RATE
†
The diagram is shown in the slave mode.
Figure 11. SPI Block Diagram
instruction set overview
Table 17 provides an opcode to instruction cross reference of all 73 instructions and 274 opcodes of the
‘370Cx1x instruction set. The numbers at the top of this table represent the most significant nibble of the opcode
whilethenumbersattheleftsideofthetablerepresenttheleastsignificantnibble(LBN). Theinstructionofthese
two opcode nibbles contains the mnemonic, operands, and byte/cycle particular to that opcode.
For example, the opcode B5h points to the CLR A instruction. This instruction contains one byte and executes
in eight SYSCLK cycles.
27
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
†
Table 17. TMS370 Family Opcode/Instruction Map
MSN
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
JMP
ra
2/7
INCW
#n,Rd
3/11
MOV
Ps,A
2/8
CLRC
TST A
1/9
/
MOV
A,B
1/9
MOV
A,Rd
2/7
TRAP
15
1/14
LDST
n
2/6
0
1
2
3
4
5
6
7
8
9
A
B
JN
ra
2/5
MOV
A,Pd
2/8
MOV
B,Pd
2/8
MOV
Rs,Pd
3/10
MOV
Ps,B
2/7
MOV
B,Rd
2/7
TRAP
14
1/14
MOV
*n[SP],A
2/7
JZ
ra
2/5
MOV
Rs,A
2/7
MOV
#n,A
2/6
MOV
Rs,B
2/7
MOV
Rs,Rd
3/9
MOV
#n,B
2/6
MOV
B,A
1/8
MOV
#n,Rd
3/8
MOV
Ps,Rd
3/10
DEC
A
1/8
DEC
B
1/8
DEC
Rn
2/6
TRAP
13
1/14
MOV
A,*n[SP]
2/7
JC
ra
2/5
AND
Rs,A
2/7
AND
#n,A
2/6
AND
Rs,B
2/7
AND
Rs,Rd
3/9
AND
#n,B
2/6
AND
B,A
1/8
AND
#n,Rd
3/8
AND
A,Pd
2/9
AND
B,Pd
2/9
AND
#n,Pd
3/10
INC
A
1/8
INC
B
1/8
INC
Rn
2/6
TRAP
12
1/14
CMP
*n[SP],A
2/8
JP
ra
2/5
OR
Rs,A
2/7
OR
#n,A
2/6
OR
Rs,B
2/7
OR
Rs,Rd
3/9
OR
#n,B
2/6
OR
B,A
1/8
OR
#n,Rd
3/8
OR
A,Pd
2/9
OR
B,Pd
2/9
OR
#n,Pd
3/10
INV
A
1/8
INV
B
1/8
INV
Rn
2/6
TRAP
11
1/14
extend
inst,2
opcodes
JPZ
ra
2/5
XOR
Rs,A
2/7
XOR
#n,A
2/6
XOR
Rs,B
2/7
XOR
Rs,Rd
3/9
XOR
#n,B
2/6
XOR
B,A
1/8
XOR
#n,Rd
3/8
XOR
A,Pd
2/9
XOR
B,Pd
2/9
XOR
#n,Pd
3/10
CLR
A
1/8
CLR
B
1/8
CLR
Rn
2/6
TRAP
10
1/14
L
S
N
JNZ
ra
2/5
BTJO
Rs,A,ra
3/9
BTJO
#n,A,ra
3/8
BTJO
Rs,B,ra
3/9
BTJO
Rs,Rd,ra
4/11
BTJO
#n,B,ra
3/8
BTJO
B,A,ra
2/10
BTJO
#n,Rd,ra
4/10
BTJO
A,Pd,ra
3/11
BTJO
B,Pd,ra
3/10
BTJO
#n,Pd,ra
4/11
XCHB
A
1/10
XCHB A /
TST B
1/10
XCHB
Rn
2/8
TRAP
9
1/14
IDLE
1/6
JNC
ra
2/5
BTJZ
Rs.,A,ra
3/9
BTJZ
#n,A,ra
3/8
BTJZ
Rs,B,ra
3/9
BTJZ
Rs,Rd,ra
4/11
BTJZ
#n,B,ra
3/8
BTJZ
B,A,ra
2/10
BTJZ
#n,Rd,ra
4/10
BTJZ
A,Pd,ra
3/10
BTJZ
B,Pd,ra
3/10
BTJZ
#n,Pd,ra
4/11
SWAP
A
1/11
SWAP
B
1/11
SWAP
Rn
2/9
TRAP
8
1/14
MOV
#n,Pd
3/10
JV
ra
2/5
ADD
Rs,A
2/7
ADD
#n,A
2/6
ADD
Rs,B
2/7
ADD
Rs,Rd
3/9
ADD
#n,B
2/6
ADD
B,A
1/8
ADD
#n,Rd
3/8
MOVW
#16,Rd
4/13
MOVW
Rs,Rd
3/12
MOVW
#16[B],Rd
4/15
PUSH
A
1/9
PUSH
B
1/9
PUSH
Rs
2/7
TRAP
7
1/14
SETC
1/7
JL
ra
2/5
ADC
Rs,A
2/7
ADC
#n,A
2/6
ADC
Rs,B
2/7
ADC
Rs,Rd
3/9
ADC
#n,B
2/6
ADC
B,A
1/8
ADC
#n,Rd
3/8
JMPL
lab
3/9
JMPL
*Rd
2/8
JMPL
*lab[B]
3/11
POP
A
1/9
POP
B
1/9
POP
Rd
2/7
TRAP
6
1/14
RTS
1/9
JLE
ra
2/5
SUB
Rs,A
2/7
SUB
#n,A
2/6
SUB
Rs,B
2/7
SUB
Rs,Rd
3/9
SUB
#n,B
2/6
SUB
B,A
1/8
SUB
#n,Rd
3/8
MOV
& lab,A
3/10
MOV
*Rs,A
2/9
MOV
*lab[B],A
3/12
DJNZ
A,ra
2/10
DJNZ
B,ra
2/10
DJNZ
Rn,ra
3/8
TRAP
5
1/14
RTI
1/12
JHS
ra
2/5
SBB
Rs,A
2/7
SBB
#n,A
2/6
SBB
Rs,B
2/7
SBB
Rs,Rd
3/9
SBB
#n,B
2/6
SBB
B,A
1/8
SBB
#n,Rd
3/8
MOV
A, & lab
3/10
MOV
A, *Rd
2/9
MOV
A,*lab[B]
3/12
COMPL
A
1/8
COMPL
B
1/8
COMPL
Rn
2/6
TRAP
4
1/14
PUSH
ST
1/8
†
All conditional jumps (opcodes 01–0F), BTJO, BTJZ, and DJNZ instructions use two additional cycles if the branch is taken. The BTJO, BTJZ, and DJNZ
instructions have a relative address as the last operand.
†
Table 17. TMS370 Family Opcode/Instruction Map (Continued)
MSN
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
JNV
ra
2/5
MPY
Rs,A
2/46
MPY
#n,A
2/45
MPY
Rs,B
2/46
MPY
Rs,Rd
3/48
MPY
#n,B
2/45
MPY
B,A
1/47
MPY
#n,Rs
3/47
BR
lab
3/9
BR
*Rd
2/8
BR
*lab[B]
3/11
RR
A
1/8
RR
B
1/8
RR
Rn
2/6
TRAP
3
1/14
POP
ST
1/8
C
D
E
F
JGE
ra
2/5
CMP
Rs,A
2/7
CMP
#n,A
2/6
CMP
Rs,B
2/7
CMP
Rs,Rd
3/9
CMP
#n,B
2/6
CMP
B,A
1/8
CMP
#n,Rd
3/8
CMP
& lab,A
3/11
CMP
*Rs,A
2/10
CMP
*lab[B],A
3/13
RRC
A
1/8
RRC
B
1/8
RRC
Rn
2/6
TRAP
2
1/14
LDSP
1/7
L
S
N
JG
ra
2/5
DAC
Rs,A
2/9
DAC
#n,A
2/8
DAC
Rs,B
2/9
DAC
Rs,Rd
3/11
DAC
#n,B
2/8
DAC
B,A
1/10
DAC
#n,Rd
3/10
CALL
lab
3/13
CALL
*Rd
2/12
CALL
*lab[B]
3/15
RL
A
1/8
RL
B
1/8
RL
Rn
2/6
TRAP
1
1/14
STSP
1/8
JLO
ra
2/5
DSB
Rs,A
2/9
DSB
#n,A
2/8
DSB
Rs,B
2/9
DSB
Rs,Rd
3/11
DSB
#n,B
2/8
DSB
B,A
1/10
DSB
#n,Rd
3/10
CALLR
lab
3/15
CALLR
*Rd
2/14
CALLR
*lab[B]
3/17
RLC
A
1/8
RLC
B
1/8
RLC
Rn
2/6
TRAP
0
1/14
NOP
1/7
MOVW
*n[Rn]
4/15
DIV
Rn.A
3/14-63
Second byte of two-byte instructions (F4xx):
F4
F4
F4
F4
F4
F4
F4
F4
8
9
JMPL
*n[Rn]
4/16
Legend:
MOV
*n[Rn],A
4/17
A
B
C
D
E
F
*
&
#
=
=
=
Indirect addressing operand prefix
Direct addressing operand prefix
immediate operand
MOV
A,*n[Rn]
4/16
#16 = immediate 16-bit number
lab
n
Pd
Pn
Ps
ra
Rd
Rn
Rp
=
=
=
=
=
=
=
=
=
16-label
immediate 8-bit number
Peripheral register containing destination type
Peripheral register
Peripheral register containing source byte
Relative address
Register containing destination type
Register file
Register pair
BR
*n[Rn]
4/16
CMP
*n[Rn],A
4/18
CALL
*n[Rn]
4/20
Rpd= Destination register pair
Rps = Source Register pair
CALLR
*n[Rn]
4/22
Rs
= Register containing source byte
†
All conditional jumps (opcodes 01–0F), BTJO, BTJZ, and DJNZ instructions use two additional cycles if the branch is taken. The BTJO, BTJZ, and DJNZ
instructions have a relative address as the last operand.
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
development system support
The TMS370 family development support tools include an assembler, a C-compiler, a linker, an in-circuit
emulator XDS/22, CDT and an EEPROM/UVEPROM programmer.
Assembler/linker (Part No. TMDS3740850–02 for PC)
–
–
–
Includes extensive macro capability
Provides high-speed operation
Includes format conversion utilities for popular formats
ANSI C Compiler (Part No. TMDS3740855–02 for PC, Part No. TMDS3740555–09 for HP700 , Sun-3
or Sun-4 )
–
–
–
–
–
–
Generate assembly code for the TMS370 that can be inspected easily
Improves code execution speed and reduces code size with optional optimizer pass
Enables direct reference the TMS370’s port registers by using a naming convention
Provides flexibility in specifying the storage for data objects
Interfaces C functions and assembly functions easily
Includes assembler and linker
CDT370 (Compact Development Tool) real-time in-circuit emulation
–
Base (Part Number EDSCDT370 – for PC, requires cable)
–
–
Cable for 28-pin DIP (Part No. EDSTRG28DIL)
Cable for 28-pin PLCC (Part No. EDSTRG28PLCC)
–
–
–
–
–
–
–
EEPROM and EPROM programming support
Allows inspection and modification of memory locations
Includes compatibility to upload/download program and data memory
Execute programs and software routines
Includes 1024 samples trace buffer
Includes single-step executable instructions
Uses software breakpoints to halt program execution at selected address
XDS/22 in-circuit emulator
–
Base (Part Number TMDS3762210 for PC, requires cable)
Cable for 28-pin DIP/PLCC (Part No. TMDS3788828)
–
–
–
–
Contains all the features of the CDT370 described previously but does not have the capability to
program the data EEPROM and program EPROM
Contains sophisticated breakpoint trace and timing hardware that provides up to 2047 qualified trace
samples with symbolic disassembly
Allowsqualificationofbreakpointsbyaddressand/ordataonanytypeofmemoryacquisition. Uptofour
levels of events can be combined to cause a breakpoint
HP700 is a trademark of Hewlett-Packard Company.
Sun-3 and Sun-4 are trademarks of Sun Microsystems, Incorporated.
30
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
development system support (continued)
–
–
Provides timers for analyzing total and average time in routines
Contains an eight-line logic probe for adding visibility of external signals to the breakpoint qualifier and
to trace display
Microcontroller programmer
–
Base (Part No. TMDS3760500A – for PC, requires programmer head)
–
–
Single unit head for 28-pin PLCC (Part No. TMDS3780510A)
Single unit head for 28-pin DIP (Part No. TMDS3780511A)
–
PC-based, window/function-key-orienteduserinterfaceforeaseofuseandrapidlearningenvironment
Design kit (Part No. TMDS3770110 – for PC)
–
–
–
–
–
–
–
Includes TMS370 Application Board and TMS370 Assembler diskette and documentation
Supports quick evaluation of TMS370 functionality
Capability to upload and download code
Capability to execute programs and software routines, and to single-step executable instructions
Software breakpoints to halt program execution at selected addresses
Wire-wrap prototype area
Reverse assembler
Starter Kit (Part No. TMDS37000 – for PC)
–
–
–
–
Includes TMS370 Assembler diskette and documentation
Includes TMS370 Simulator
Includes programming adapter board and programming software
Does not include (to be supplied by the user)
–
–
–
+ 5 V power supply
ZIF sockets
Nine-pin RS232 cable
31
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
device numbering conventions
Figure 12 illustrates the numbering and symbol nomenclature for the TMS370Cx1x family.
TMS 370 C
7
1
2
A FN L
Prefix: TMS = Standard prefix for fully qualified devices
SE = System evaluator (window EPROM) that is used for
prototyping purpose.
Family: 370 = TMS370 8-Bit Microcontroller Family
Technology:
C = CMOS
Program Memory Types:
0 = Mask ROM
3 = Mask ROM, No Data EEPROM
7 = EPROM
Device Type:
1 = ’x1x device containing the following modules:
– Timer 1
– Serial Peripheral Interface
Memory Size:
0 = 4K bytes
1 = 2K bytes
2 = 8K bytes
Temperature Ranges:
Packages:
A = –40°C to 85°C
L =
0°C to 70°C
T = –40°C to 105°C
FN = Plastic Leaded Chip Carrier
FZ = Ceramic Leaded Chip Carrier
N = Plastic Dual-In-Line
JD = Ceramic Dual-in-Line
ROM and EPROM Option:
A = For ROM device, the watchdog timer can be configured
as one of the three different mask options:
– A standard watchdog
– A hard watchdog
– A simple watchdog
The clock can be either:
– Divide-by-4 clock
– Divide-by-1 (PLL) clock
The low-power modes can be either:
– Enabled
– Disabled
A = For EPROM device, a standard watchdog, a divide-by-
4 clock, and low-power modes are enabled
B = For EPROM device, a hard watchdog, a divide-by-1
(PLL) clock, and low-power modes are enabled.
Figure 12. TMS370Cx1x Family Nomenclature
32
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
device part numbers
Table 18 provides all of the ’x1x devices available. The device part number nomenclature is designed to assist
ordering. Upon ordering, the customer must specify not only the device part number, but also the clock and
watchdog timer options desired. Each device can have only one of the three possible watchdog timer options
and one of the two clock options. The options to be specified pertain solely to orders involving ROM devices.
Table 18. Device Part Numbers
DEVICES PART NUMBERS
FOR 28 PINS (LCC)
DEVICES PART NUMBERS
FOR 28 PINS (DIP)
TMS370C010AFNA
TMS370C010AFNL
TMS370C010AFNT
TMS370C010ANA
TMS370C010ANL
TMS370C010ANT
TMS370C012AFNA
TMS370C012AFNL
TMS370C012AFNT
TMS370C012ANA
TMS370C012ANL
TMS370C012ANT
TMS370C310AFNA
TMS370C310AFNL
TMS370C310AFNT
TMS370C310ANA
TMS370C310ANL
TMS370C310ANT
TMS370C311AFNA
TMS370C311AFNL
TMS370C311AFNT
TMS370C311ANA
TMS370C311ANL
TMS370C311ANT
TMS370C312AFNA
TMS370C312AFNL
TMS370C312AFNT
TMS370C312ANA
TMS370C312ANL
TMS370C312ANT
TMS370C712AFNT
TMS370C712BFNT
TMS370C712ANT
TMS370C712BNT
†
†
†
†
SE370C712AFZT
SE370C712BFZT
SE370C712AJDT
SE370C712BJDT
†
System evaluators are for use in prototype environment and their
reliability has not been characterized.
33
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
new code release form
Figure 13 shows a sample of the new code release form.
NEW CODE RELEASE FORM
TEXAS INSTRUMENTS
DATE:
TMS370 MICROCONTROLLER PRODUCTS
To release a new customer algorithm to TI incorporated into a TMS370 family microcontroller, complete this form and submit with the following information:
1. A ROM description in object form on Floppy Disk, Modem XFR, or EPROM (Verification file will be returned via same media)
2. An attached specification if not using TI standard specification as incorporated in TI’s applicable device data book.
Company Name:
Street Address:
Street Address:
City:
Contact Mr./Ms.:
Phone: (
)
Ext.:
State
Zip
Customer Purchase Order Number:
Customer Print Number *Yes:
No:
*If Yes: Customermust provide ”print” to TI w/NCRF for approvalbefore ROM
code processing starts.
#
Customer Part Number:
Customer Application:
(Std. spec to be followed)
TMS370 Device:
TI Customer ROM Number:
(provided by Texas Instruments)
CONTACT OPTIONS FOR THE ’A’ VERSION TMS370 MICROCONTROLLERS
OSCILLATOR FREQUENCY
Low Power Modes
[] Enabled
[] Disabled
Watchdog counter
[] Standard
[] Hard Enabled
[] Simple Counter
Clock Type
[] Standard (/4)
[] PLL (/1)
MIN
TYP
MAX
[] External Drive (CLKIN)
[] Crystal
[] Ceramic Resonator
NOTE:
Non ’A’ version ROM devices of the TMS370 microcontrollers will have the
“Low-powermodesEnabled”, “Divide-by-4”Clock, and“Standard”Watchdog
options. See the TMS370 Family User’s Guide (literature number SPNU127)
or the TMS370 Family Data Manual (literature number SPNS014B).
[] Supply Voltage MIN:
(std range: 4.5V to 5.5V)
MAX:
TEMPERATURE RANGE
PACKAGE TYPE
[] ’L’:
[] ’A’:
[] ’T’:
0° to 70°C (standard)
–40° to 85°C
–40° to 105°C
[] ’N’ 28-pin PDIP
[] “FN” 28-pin PLCC
[] “N” 40-pin PDIP
[] “FN” 44-pin PLCC
[] “FN” 68-pin PLCC
[] “NM” 64-pin PSDIP
[] “NJ” 40-pin PSDIP (formerly known as N2)
SYMBOLIZATION
BUS EXPANSION
[] TI standard symbolization
[] YES
[] NO
[] TI standard w/customer part number
[] Customer symbolization
(per attached spec, subject to approval)
NON-STANDARD SPECIFICATIONS:
ALL NON-STANDARDS SPECIFICATIONS MUST BE APPROVED BY THE TI ENGINEERING STAFF: If the customer requires expedited production material
(i.e., product which must be started in process prior to prototype approval and full production release) and non-standard spec issues are not resolved to the
satisfaction of both the customer and TI in time for a scheduled shipment, the specification parameters in question will be processed/tested to the standard
TI spec. Any such devices which are shipped without conformance to a mutually approved spec, will be identified by a ’P’ in the symbolization preceding the
TI part number.
RELEASE AUTHORIZATION:
This document, including any referenced attachments, is and will be the controlling document for all orders placed for this TI custom device. Any changes must
be in writing and mutually agreed to by both the customer and TI. The prototype cycletime commences when this document is signed off and the verification
code is approved by the customer.
1. Customer:
Date:
2. TI: Field Sales:
Marketing:
Prod. Eng.:
Proto. Release:
Figure 13. Sample New Code Release Form
34
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
Table 19 is a collection of all the peripheral file frames used in the ’Cx1x (provided for a quick reference).
Table 19. Peripheral File Frame Compilation
PF
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
REG
System Configuration Registers
COLD
START
OSC
POWER
PF AUTO
WAIT
OSC FLT
FLAG
MC PIN
WPO
MC PIN
DATA
µP/µC
MODE
P010
P011
P012
—
—
SCCR0
SCCR1
SCCR2
AUTO
WAIT
DISABLE
MEMORY
DISABLE
—
—
—
—
—
—
HALT/
STANDBY
PWRDWN/
IDLE
BUS
STEST
CPU
STEST
INT1
NMI
PRIVILEGE
DISABLE
—
P013
to
Reserved
P016
INT1
FLAG
INT1
PIN DATA
INT1
POLARITY
INT1
PRIORITY
INT1
ENABLE
P017
P018
P019
—
—
—
—
INT1
INT2
INT2
FLAG
INT2
PIN DATA
INT2
DATA DIR
INT2
DATA OUT
INT2
POLARITY
INT2
PRIORITY
INT2
ENABLE
INT3
FLAG
INT3
PIN DATA
INT3
DATA DIR
INT3
DATA OUT
INT3
POLARITY
INT3
PRIORITY
INT3
ENABLE
—
—
INT3
P01A
P01B
P01C
BUSY
BUSY
—
—
—
—
AP
—
W1W0
W0
EXE
EXE
DEECTL
Reserved
VPPS
—
—
EPCTL
P01D
P01E
P01F
Reserved
Digital Port Control Registers
P020
P021
P022
P023
Reserved
APORT1
APORT2
ADATA
ADIR
Port A Control Register 2 (must be 0)
Port A Data
Port A Direction
P024
to
Reserved
P02B
P02C
P02D
P02E
P02F
Port D Control Register 1 (must be 0)
—
—
—
—
—
—
—
—
—
—
—
—
DPORT1
DPORT2
DDATA
DDIR
†
Port D Control Register 2 (must be 0)
Port D Data
Port D Direction
SPI Module Control Register Memory Map
SPI SW
RESET
CLOCK
POLARITY
SPI BIT
RATE2
SPI BIT
RATE1
SPI BIT
RATE0
SPI
CHAR2
SPI
CHAR1
SPI
CHAR0
P030
P031
SPICCR
SPICTL
RECEIVER
OVERRUN
SPI INT
FLAG
MASTER/
SLAVE
SPI INT
ENA
—
—
—
TALK
P032
to
Reserved
P036
P037
P038
RCVD7
RCVD6
RCVD5
RCVD4
RCVD3
Reserved
RCVD2
RCVD1
RCVD0
SPIBUF
†
D3 as SYSCLK, set port D control register 2 = 08h.
35
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
Table 19. Peripheral File Frame Compilation (Continued)
PF
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
REG
P039
SDAT7
SDAT6
SDAT5
SDAT4
SDAT3
SDAT2
SDAT1
SDAT0
SPIDAT
P03A
to
Reserved
P03C
SPICLK
DATA IN
SPICLK
DATA OUT
SPICLK
FUNCTION
SPICLK
DATA DIR
P03D
P03E
P03F
—
—
—
—
SPIPC1
SPIPC2
SPIPRI
SPISIMO
DATA IN
SPISIMO
DATA OUT
SPISIMO
FUNCTION
SPISIMO
DATA DIR
SPISOMI
DATA IN
SPISOMI
DATA OUT
SPISOMI
FUNCTION
SPISOMI
DATA DIR
SPI
STEST
SPI
RIORITY
SPI
ESPEN
—
—
—
—
—
Timer1 Module Register Memory Map
Modes: Dual-Compare and Capture/Compare
P040 Bit 15
P041 Bit 7
P042 Bit 15
P043 Bit 7
P044 Bit 15
P045 Bit 7
P046 Bit 15
P047 Bit 7
P048 Bit 7
T1Counter MSbyte
T1 Counter LSbyte
Bit 8 T1CNTR
Bit 0
Compare Register MSbyte
Compare Register LSbyte
Capture/Compare Register MSbyte
Capture/Compare Register LSbyte
Watchdog Counter MSbyte
Watchdog Counter LSbyte
Watchdog Reset Key
Bit 8 T1C
Bit 0
Bit 8 T1CC
Bit 0
Bit 8 WDCNTR
Bit 0
Bit 0 WDRST
WD OVRFL
TAP SEL
WD INPUT
SELECT2
WD INPUT
SELECT1
WD INPUT
SELECT0
T1 INPUT
SELECT2
T1 INPUT
SELECT1
T1 INPUT
SELECT0
P049
P04A
—
T1CTL1
T1CTL2
†
†
†
†
WD OVRFL
WD OVRFL
INT ENA
WD OVRFL
INT FLAG
T1 OVRFL
INT ENA
T1 OVRFL
INT FLAG
T1
—
—
†
RST ENA
SW RESET
Mode: Dual-Compare
T1EDGE
INT FLAG
T1C2
INT FLAG
T1C1
INT FLAG
T1EDGE
INT ENA
T1C2
INT ENA
T1C1
INT ENA
P04B
—
—
T1CTL3
T1CTL4
T1C1
OUT ENA
T1C2
OUT ENA
T1C1
RST ENA
T1CR
OUT ENA
T1EDGE
POLARITY
T1CR
RST ENA
T1EDGE
DET ENA
P04C T1 MODE=0
Mode: Capture/Compare
T1EDGE
—
T1C1
INT FLAG
T1EDGE
INT ENA
T1C1
INT ENA
P04B
P04C
—
—
—
—
—
T1CTL3
T1CTL4
INT FLAG
T1
T1C1
T1C1
RST ENA
T1EDGE
POLARITY
T1EDGE
DET ENA
—
MODE = 1
OUT ENA
Modes: Dual-Compare and Capture/Compare
T1EVT
DATA IN
T1EVT
DATA OUT
T1EVT
FUNCTION
T1EVT
DATA DIR
P04D
P04E
P04F
—
—
—
—
T1PC1
T1PC2
T1PRI
T1PWM
DATA IN
T1PWM
DATA OUT
T1PWM
FUNCTION
T1PWM
DATA DIR
T1IC/CR
DATA IN
T1IC/CR
DATA OUT
T1IC/CR
FUNCTION
T1IC/CR DATA
DIR
T1
T1 STEST
—
—
—
—
—
—
PRIORITY
†
Once the WD OVRFL RST ENA bit is set, these bits cannot be changed until a reset; this applies only to the standard
watchdog and to simple counter. In the hard watchdog, these bits can be modified at any time; the WD INPUT SELECT2
bits are ignored.
36
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
†
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range,V
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.6 V to 7 V
CC
Input voltage range, All pins except MC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.6 V to 7 V
MC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.6 V to 14 V
Input clamp current, I (V < 0 or V > V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
(V < 0 or V > V ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
IK
I
I
CC)
Output clamp current, I
OK
O
O
CC
Continuous output current per buffer, I (V = 0 to V ) (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . ±10 mA
O
O
CC)
Maximum I
current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170 mA
CC
Maximum I current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 170 mA
SS
Continuous power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500 mW
Operating free-air temperature range, T : L version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
A
A version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40°C to 85°C
T version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40°C to 105°C
Storage temperature range, T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
stg
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. Unless otherwise noted, all voltage values are with respect to V
.
SS
2. Electrical characteristics are specified with all output buffers loaded with specified I current. Exceeding the specified I current in
O
O
any buffer can affect the levels on other buffers.
recommended operating conditions
MIN
4.5
3
NOM
MAX
5.5
UNIT
V
Supply voltage (see Note 1)
5
V
V
CC
RAM data-retention supply voltage (see Note 3)
All pins except MC
MC, normal operation
5.5
V
V
SS
0.8
Low-level input voltage
High-level input voltage
V
V
IL
V
SS
0.3
All pins except MC, XTAL2/CLKIN, and
RESET
2
V
CC
V
V
IH
XTAL2/CLKIN
0.8 V
0.7 V
V
CC
CC
CC
RESET
V
CC
13
EEPROM write protect override (WPO)
11.7
13
12
MC (mode control) voltage
EPROM programming voltage (V
Microcomputer
L version
)
13.2
13.5
0.3
70
V
MC
PP
V
SS
0
T
A
Operating free-air temperature
A version
– 40
– 40
85
°C
T version
105
NOTES: 1. Unless otherwise noted, all voltage values are with respect to V
.
SS
3. RESET must be externally activated when V
CC
or SYSCLK is not within the recommended operating range.
37
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
Low-level output voltage
TEST CONDITIONS
MIN
TYP
MAX
UNIT
V
V
I
I
I
= 1.4 mA
= –50 µA
= –2 mA
0.4
V
OL
OL
OH
OH
0.9 V
CC
High-level output voltage
Input current
V
OH
2.4
0 V ≤ V ≤ 0.3 V
10
I
µA
0.3 V < V ≤ 13 V
650
I
MC
I
I
See Note 4
50
mA
12 V ≤ V ≤ 13 V
I
I/O pins
0 V ≤ V ≤ V
± 10
µA
mA
µA
I
CC
I
I
Low-level output current
High-level output current
V
OL
V
OH
V
OH
= 0.4 V
1.4
– 50
– 2
OL
= 0.9 V
= 2.4 V
CC
OH
mA
See Notes 5 and 6
SYSCLK = 5 MHz
20
13
5
36
25
11
Supply current (operating mode)
OSC POWER bit = 0 (see Note 7)
See Notes 5 and 6
SYSCLK = 3 MHz
mA
mA
See Notes 5 and 6
SYSCLK = 0.5 MHz
See Notes 5 and 6
SYSCLK = 5 MHz
10
6.5
2
17
11
Supply current (STANDBY mode)
OSC POWER bit = 0 (see Note 8)
See Notes 5 and 6
SYSCLK = 3 MHz
I
CC
See Notes 5 and 6
SYSCLK = 0.5 MHz
3.5
8.6
3.0
30
See Notes 5 and 6
SYSCLK = 3 MHz
4.5
1.5
1
Supply current (STANDBY mode)
OSC POWER bit = 1 (see Note 9)
mA
See Notes 5 and 6
SYSCLK = 0.5 MHz
See Note 5
XTAL2/CLKIN < 0.2 V
Supply current (HALT mode)
µA
NOTES: 4. Input current I
is a maximum of 50 mA only when you are programming EPROM.
PP
5. Single chip mode, ports configured as inputs or outputs with no load. All inputs ≤ 0.2 V or ≥ V
– 0.2V.
CC
6. XTAL2/CLKIN is driven with an external square wave signal with 50% duty cycle and rise and fall times less than 10 ns. Current
can be higher with a crystal oscillator. At 5 MHz SYSCLK, this extra current = 0.01 mA x (total load capacitance + crystal capacitance
in pF).
7. Maximum operating current = 5.6 (SYSCLK) + 8 mA.
8. Maximum standby current = 3 (SYSCLK) + 2 mA. (OSC POWER bit = 0).
9. Maximum standby current = 2.24 (SYSCLK) + 1.9 mA. (OSC POWER bit = 1, only valid up to 3 MHz SYSCLK).
38
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
XTAL2/CLKIN
XTAL1
XTAL2/CLKIN
XTAL1
C3
C1
(see Note B)
C2
Crystal/Ceramic
Resonator
(see Note A)
(see Note B)
External
Clock Signal
(see Note B)
NOTES: A. The crystal/ceramic resonator frequency is four times the reciprocal of the system clock period.
B. The values of C1 and C2 are typically 15 pF and the value of C3 is typically 50 pF. See the manufacturer’s recommendations for
ceramic resonators.
Figure 14. Recommended Crystal/Clock Connections
Load Voltage
1.2 kΩ
V
O
20 pF
Case 1: V = V
= 2.4 V; Load Voltage = 0 V
= 0.4 V; Load Voltage = 2.1 V
O
OH
OL
Case 2: V = V
O
NOTE A: All measurements are made with the pin loading as shown unless otherwise noted. All measurements are made with XTAL2/CLKIN
driven by an external square wave signal with a 50% duty cycle and rise and fall times less than 10 ns unless otherwise stated.
Figure 15. Typical Output Load Circuit (See Note A)
V
CC
V
CC
Pin Data
300 Ω
30 Ω
6 kΩ
Output
Enable
I/O
INT1
20 Ω
20 Ω
GND
GND
Figure 16. Typical Buffer Circuitry
39
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
PARAMETER MEASUREMENT INFORMATION
timing parameter symbology
Timing parameter symbols have been created in accordance with JEDEC Standard 100. In order to shorten the
symbols, some of the pin names and other related terminology have been abbreviated as follows:
AR
B
Array
SC
SYSCLK
Byte
SIMO SPISIMO
SOMI SPISOMI
CI
M
S
XTAL2/CLKIN
Master mode
Slave mode
SPC
SPICLK
Lowercase subscripts and their meanings are:
c
d
f
cycle time (period)
delay time
fall time
su
v
setup time
valid time
w
pulse duration (width)
r
rise time
The following additional letters are used with these meanings:
H
L
High
Low
Valid
V
All timings are measured between high and low measurement points as indicated in Figure 17 and Figure 18.
0.8 V
V (High)
2 V (High)
CC
0.8 V (Low)
0.8 V (Low)
Figure 17. XTAL2/CLKIN Measurement Points
Figure 18. General Measurement Points
40
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
external clocking requirements for clock divided by 4 (see Note 10 and Figure 19)
NO.
1
PARAMETER
Pulse duration, XTAL2/CLKIN (see Note 11)
Rise time, XTAL2/CLKIN
MIN
MAX
UNIT
ns
t
t
t
t
20
w(Cl)
2
30
30
100
20
5
ns
r(Cl)
3
Fall time, XTAL2/CLKIN
ns
f(CI)
4
Delay time, XTAL2/CLKIN rise to SYSCLK fall
Crystal operating frequency
ns
d(CIH-SCL)
CLKIN
2
MHz
MHz
†
SYSCLK
Internal system clock operating frequency
0.5
†
SYSCLK = CLKIN/4
NOTES: 10. For V and V , refer to recommended operating conditions.
IL IH
11. This pulse may be either a high pulse which extends from the earliest valid high to the final valid high in an XTAL2/CLKIN cycle or
a low pulse, which extends from the earliest valid low to the final valid low in an XTAL2/CLKIN cycle.
1
XTAL2/CLKIN
2
3
4
SYSCLK
Figure 19. External Clock Timing for Divide-by-4
external clocking requirements for clock divided by 1 (PLL) (see Note 10 and Figure 20)
NO.
1
PARAMETER
Pulse duration, XTAL2/CLKIN (see Note 11)
Rise time, XTAL2/CLKIN
MIN
MAX
UNIT
ns
t
t
t
t
20
w(Cl)
2
30
30
100
5
ns
r(Cl)
3
Fall time, XTAL2/CLKIN
ns
f(CI)
4
Delay time, XTAL2/CLKIN rise to SYSCLK rise
Crystal operating frequency
ns
d(CIH-SCH)
CLKIN
2
2
MHz
MHz
‡
SYSCLK
Internal system clock operating frequency
5
‡
SYSCLK = CLKIN/1
NOTES: 10. For V and V , refer to recommended operating conditions.
IL IH
11. This pulse can be either a high pulse which extends from the earliest valid high to the final valid high in an XTAL2/CLKIN cycle or
a low pulse, which extends from the earliest valid low to the final valid low in an XTAL2/CLKIN cycle.
1
XTAL2/CLKIN
4
2
3
SYSCLK
Figure 20. External Clock Timing for Divide-by-1
41
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
switching characteristics and timing requirements (see Note 12 and Figure 21)
NO.
PARAMETER
MIN
200
200
MAX
2000
500
UNIT
Divide by 4
Divide by 1
5
t
c
Cycle time, SYSCLK
ns
6
7
t
t
Pulse duration, SYSCLK low
Pulse duration, SYSCLK high
0.5 t –20
0.5 t
c
ns
ns
w(SCL)
c
0.5 t
0.5 t + 20
c
w(SCH)
c
NOTE 12: t = system-clock cycle time = 1/SYSCLK
c
5
7
6
SYSCLK
Figure 21. SYSCLK Timing
general purpose output signal switching time requirements (see Figure 22)
MIN NOM
MAX
UNIT
ns
t
t
Rise time
Fall time
30
30
r
ns
f
t
r
t
f
Figure 22. Signal Switching Timing
recommended EEPROM timing requirements for programming
MIN
10
MAX
UNIT
ms
t
t
Pulse duration, programming signal to ensure valid data is stored (byte mode)
Pulse duration, programming signal to ensure valid data is stored (array mode)
w(PGM)B
20
ms
w(PGM)AR
recommended EPROM operating conditions for programming
MIN NOM
MAX
6
UNIT
V
V
V
Supply voltage
4.75
13
5.5
13.2
30
CC
Supply voltage at MC pin
13.5
50
5
V
PP
I
Supply current at MC pin during programming (V
= 13 V)
mA
PP
PP
Divide by 4
Divide by 1
0.5
2
SYSCLK
System clock
MHz
5
recommended EPROM timing requirements for programming
MIN NOM
0.40 0.50
MAX
UNIT
t
Pulse duration, programming signal (see Note 13)
3
ms
w(EPGM)
NOTE 13: Programming pulse is active when both EXE (EPCTL.0) and V
(EPCTL.6) are set.
PPS
42
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
SPI master mode external timing characteristics and requirements (see Note 12 and Figure 23)
NO.
38
39
40
41
42
43
MIN
2t
MAX
256t
UNIT
ns
t
t
t
t
t
t
Cycle time, SPICLK
c(SPC)M
c
c
Pulse duration, SPICLK low
t
– 45
– 55
0.5t
0.5t
+45
+45
ns
w(SPCL)M
c
c
c(SPC)
Pulse duration, SPICLK high
t
ns
w(SPCH)M
c(SPC)
50
Delay time, SPISIMO valid after SPICLK low (polarity = 1)
Valid time, SPISIMO data valid after SPICLK high (polarity =1)
Setup time, SPISOMI to SPICLK high (polarity = 1)
– 65
ns
d(SPCL-SIMOV)M
v(SPCH-SIMO)M
su(SOMI-SPCH)M
t
– 50
ns
w(SPCH)
0.25 t + 150
c
ns
Valid time, SPISOMI data valid after SPICLK high
(polarity = 1)
44
t
0
ns
v(SPCH-SOMI)M
NOTE 12: t = system-clock cycle time = 1/SYSCLK
c
38
40
39
SPICLK
41
42
Data Valid
SPISIMO
43
44
Data Valid
SPISOMI
NOTE A: The diagram is for polarity = 1. SPICLK is inverted when polarity = 0.
Figure 23. SPI Master External Timing
43
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
SPI slave mode external timing characteristics and requirements (see Note 12 and Figure 24)
NO.
45
46
47
48
49
50
51
MIN
8t
MAX
UNIT
ns
t
t
t
t
t
t
t
Cycle time, SPICLK
c(SPC)S
c
Pulse duration, SPICLK low
4t – 45 0.5t
c
+45
+45
ns
w(SPCL)S
c(SPC)S
Pulse duration, SPICLK high
4t – 45 0.5t
c
ns
w(SPCH)S
c(SPC)S
Delay time, SPISOMI valid after SPICLK low (polarity = 1)
Valid time, SPISOMI data valid after SPICLK high (polarity =1)
Setup time, SPISIMO to SPICLK high (polarity = 1)
Valid time, SPISIMO data after SPICLK high (polarity = 1)
3.25t + 130
ns
d(SPCL-SOMIV)S
v(SPCH-SOMI)S
su(SIMO-SPCH)S
v(SPCH-SIMO)S
c
t
ns
w(SPCH)S
0
ns
3t + 100
C
ns
NOTE 12: t = system-clock cycle time = 1/SYSCLK
c
45
47
46
SPICLK
48
49
Data Valid
SPISIMO
50
51
Data Valid
SPISOMI
NOTE A: The diagram is for polarity = 1. SPICLK is inverted when polarity = 0.
Figure 24. SPI Slave External Timing
44
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
Table 20 is designed to aid the user in referencing a device part number to a mechanical drawing. The table
shows a cross-reference of the device part number to the TMS370 generic package name and the associated
mechanical drawing by drawing number and name.
Table 20. TMS370Cx1x Family Package Type and Mechanical Cross-Reference
PKG TYPE
(mil pin spacing)
PKG TYPE NO. AND
MECHANICAL NAME
TMS370 GENERIC NAME
DEVICE PART NUMBERS
TMS370C010AFNA
TMS370C010AFNL
TMS370C010AFNT
TMS370C012AFNA
TMS370C012AFNL
TMS370C012AFNT
TMS370C310AFNA
TMS370C310AFNL
TMS370C310AFNT
TMS370C311AFNA
TMS370C311AFNL
TMS370C311AFNT
TMS370C312AFNA
TMS370C312AFNL
TMS370C312AFNT
TMS370C712AFNT
TMS370C712BFNT
FN – 28 pin
(50-mil pin spacing)
PLASTIC LEADED CHIP CARRIER
(PLCC)
FN(S-PQCC-J**) PLASTIC J-LEADED
CHIP CARRIER
FZ – 28 pin
(50-mil pin spacing)
CERAMIC LEADED CHIP CARRIER
(CLCC)
FZ(S-CQCC-J**) J-LEADED CERAMIC
CHIP CARRIER
SE370C712AFZT
SE370C712BFZT
JD – 28 pin
(100-mil pin spacing) (CDIP)
CERAMIC DUAL-IN-LINE PACKAGE
JD(R-CDIP-T**) CERAMIC SIDE-BRAZE
DUAL-IN-LINE PACKAGE
SE370C712AJDT
SE370C712BJDT
TMS370C010ANA
TMS370C010ANL
TMS370C010ANT
TMS370C012ANA
TMS370C012ANL
TMS370C012ANT
TMS370C310ANA
TMS370C310ANL
TMS370C310ANT
TMS370C311ANA
TMS370C311ANL
TMS370C311ANT
TMS370C312ANA
TMS370C312ANL
TMS370C312ANT
TMS370C712ANT
TMS370C712BNT
N – 28 pin
(100-mil pin spacing) (PDIP)
PLASTIC DUAL-IN-LINE PACKAGE
N(R-PDIP-T**) PLASTIC DUAL-IN-LINE
PACKAGE
45
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
MECHANICAL DATA
JD (R-CDIP-T**)
CERAMIC SIDE-BRAZE DUAL-IN-LINE PACKAGE
24 PIN SHOWN
A
PINS **
24
28
40
48
52
DIM
24
13
1.250
1.450
2.050
2.435
2.650
A MAX
(31,75) (36,83) (52,07) (61,85) (67,31)
0.590 (15,00)
TYP
1
12
0.065 (1,65)
0.045 (1,14)
0.175 (4,45)
0.140 (3,56)
0.620 (15,75)
0.590 (14,99)
0.075 (1,91) MAX
4 Places
Seating Plane
0.020 (0,51) MIN
0°–15°
0.125 (3,18) MIN
0.100 (2,54)
0.021 (0,53)
0.015 (0,38)
0.012 (0,30)
0.008 (0,20)
4040087/B 04/95
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. This package can be hermetically sealed with a metal lid.
D. The terminals are gold plated.
46
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
MECHANICAL DATA
N (R-PDIP-T**)
PLASTIC DUAL-IN-LINE PACKAGE
24 PIN SHOWN
A
24
13
0.560 (14,22)
0.520 (13,21)
1
12
0.060 (1,52) TYP
0.200 (5,08) MAX
0.020 (0,51) MIN
0.610 (15,49)
0.590 (14,99)
Seating Plane
0.100 (2,54)
0.125 (3,18) MIN
0.010 (0,25) NOM
0°–15°
0.021 (0,53)
0.015 (0,38)
0.010 (0,25)
PINS **
M
24
1.270
28
32
40
48
52
DIM
1.450
1.650
2.090
2.450
2.650
A MAX
(32,26) (36,83) (41,91) (53,09) (62,23) (67,31)
1.230
1.410
1.610
2.040
2.390
2.590
A MIN
(31,24) (35,81) (40,89) (51,82) (60,71) (65,79)
4040053/B 04/95
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. Falls within JEDEC MS-011
D. Falls within JEDEC MS-015 (32 pin only)
47
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
MECHANICAL DATA
FN (S-PQCC-J**)
PLASTIC J-LEADED CHIP CARRIER
20 PIN SHOWN
Seating Plane
0.004 (0,10)
0.180 (4,57) MAX
0.120 (3,05)
D
0.090 (2,29)
D1
0.020 (0,51) MIN
3
1
19
0.032 (0,81)
0.026 (0,66)
4
18
D2/E2
D2/E2
E
E1
8
14
0.021 (0,53)
0.013 (0,33)
0.050 (1,27)
9
13
0.007 (0,18)
M
0.008 (0,20) NOM
D/E
D1/E1
D2/E2
NO. OF
PINS
**
MIN
0.385 (9,78)
MAX
MIN
MAX
MIN
MAX
0.395 (10,03)
0.350 (8,89)
0.356 (9,04)
0.141 (3,58)
0.191 (4,85)
0.291 (7,39)
0.341 (8,66)
0.169 (4,29)
0.219 (5,56)
0.319 (8,10)
0.369 (9,37)
20
28
44
52
68
84
0.485 (12,32) 0.495 (12,57) 0.450 (11,43) 0.456 (11,58)
0.685 (17,40) 0.695 (17,65) 0.650 (16,51) 0.656 (16,66)
0.785 (19,94) 0.795 (20,19) 0.750 (19,05) 0.756 (19,20)
0.985 (25,02) 0.995 (25,27) 0.950 (24,13) 0.958 (24,33) 0.441 (11,20) 0.469 (11,91)
1.185 (30,10) 1.195 (30,35) 1.150 (29,21) 1.158 (29,41) 0.541 (13,74) 0.569 (14,45)
4040005/B 03/95
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. Falls within JEDEC MS-018
48
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
TMS370Cx1x
8-BIT MICROCONTROLLER
SPNS012F – MAY 1987 – REVISED FEBRUARY 1997
J-LEADED CERAMIC CHIP CARRIER
Seating Plane
MECHANICAL DATA
FZ (S-CQCC-J**)
28 LEAD SHOWN
0.040 (1,02)
45°
0.180 (4,57)
0.155 (3,94)
0.140 (3,55)
A
B
1
0.120 (3,05)
26
4
25
5
0.050 (1,27)
C
(at Seating
Plane)
A
B
0.032 (0,81)
0.026 (0,66)
0.020 (0,51)
0.014 (0,36)
19
11
18
12
0.025 (0,64) R TYP
0.040 (1,02) MIN
0.120 (3,05)
0.090 (2,29)
A
B
C
JEDEC
NO. OF
PINS**
OUTLINE
MIN
MAX
MIN
MAX
MIN
MAX
0.485
0.495
0.430
0.455
0.410
0.430
MO-087AA
MO-087AB
MO-087AC
MO-087AD
28
44
52
68
(12,32)
(12,57)
(10,92)
(11,56)
(10,41)
(10,92)
0.685
0.695
0.630
0.655
0.610
0.630
(17,40)
(17,65)
(16,00)
(16,64)
(15,49)
(16,00)
0.785
0.795
0.730
0.765
0.680
0.740
(19,94)
(20,19)
(18,54)
(19,43)
(17,28)
(18,79)
0.985
0.995
0.930
0.955
0.910
0.930
(25,02)
(25,27)
(23,62)
(24,26)
(23,11)
(23,62)
4040219/B 03/95
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. This package can be hermetically sealed with a ceramic lid using glass frit.
49
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
IMPORTANT NOTICE
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TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
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CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF
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Copyright 1998, Texas Instruments Incorporated
TMS370C012A 相关器件
型号 | 制造商 | 描述 | 价格 | 文档 |
TMS370C012AFNA | TI | 8-BIT MICROCONTROLLER | 获取价格 | |
TMS370C012AFNL | TI | 8-BIT MICROCONTROLLER | 获取价格 | |
TMS370C012AFNT | TI | 8-BIT MICROCONTROLLER | 获取价格 | |
TMS370C012ANA | TI | 8-BIT MICROCONTROLLER | 获取价格 | |
TMS370C012ANL | TI | IC 8-BIT, MROM, 5 MHz, MICROCONTROLLER, PDIP28, PLASTIC, DIP-28, Microcontroller | 获取价格 | |
TMS370C012ANT | TI | 8-BIT MICROCONTROLLER | 获取价格 | |
TMS370C012AYYZ | TI | TMS370 MICROCONTROLLER FAMILY DATA BOOK | 获取价格 | |
TMS370C020A | TI | 8-BIT MICROCONTROLLER | 获取价格 | |
TMS370C020AFNA | TI | 8-BIT MICROCONTROLLER | 获取价格 | |
TMS370C020AFNL | TI | 8-BIT MICROCONTROLLER | 获取价格 |
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